The Research On Quantum Teleportation

Lately, with the vigorous development of quantum informatics, the theory of quantum teleportation has been widely applied in each field of quantum communication. In order to measure the performance of quantum teleportation and describe the similarity between the input state and the output state, the physical concept of fidelity is introduced into the quantum communication theory. Nowadays, scientists never get a perfect process of quantum teleportation because squeezing degree of entangled state can not be infinite while applying two-mode squeezed vacuum state for quantum channel. In this paper, by employing two-mode squeezed state for quantum channel and entangled coherent state for input state, and by adjusting displacement parameter and the output end, a new improved experimental project is obtained in theory that the fidelity of quantum teleportation is 1. After a series of mathematical deduction and calculation, the corresponding function expression of the perfect output displacement parameter is obtained, and the theoretical formula of the improved experimental project is also programmed, the results of running program demonstrate viability and rationality of the improved experimental project.